Elevator-alarm.



JQG. A. ANDERSON.

ELEVATOR ALARM.

APPLIGATIQN FILED N0v.7,1911.

Patented 'May 13', 1913.

2 SHEETS-SHEET l.

J. C. A. ANDERSON.

BLBVATOR ALARM. APPLIOATION PILBD No1/27, 1911.

Patented May 13, 1913 2 SHEETS-SHEET 2.

vthereby tolimit its application.

JOHN c. A. ANDERSON,

. Tl? vH" or cnroaeo, ILLINOIS.

nL-nvA'ron-ALARM.

.To olif/whom it may 'conce-rn Be it known that I, JOHN C. A. ANDER- soiv, a citizen of the `United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Elevator-Alarms, .of which the following is a' full,"clear, concise, and 'exact description, reference being had to the accompanying drawings forming a part of this specification.

My inventionrelates to elevator indicators and alarms, and has for its general ob- `iect the provision of improved means to indicate the-weight being carried by a movable platform such forinstance as an elevator.

`My invention is applicable to a great variety of uses, but` Ihave selected for de scribing herein that particular embodiment oit my invention which relates to elevators, and more particularly to passenger elevato'rs, and IWill specifically set forth my invention as so applied, Without intending As applied to passenger elevators my invention contemplates the provision of 1nd1- catinoP means which in some embodiments' may be supplemented by alarm means to indicate the Weight carried by the car, or ifdesired to give an alarm when the weight being carried by the car exceeds a predetermined amount.. In some forms of the invention the' alarm means of coursemay be -mployed solely, thereby to give notice when `the weight within the car exceeds a prede termined amount.

InY the operation of elevator cars it Will be noted that the Weight carried by the car may be a givenE amount. 'It' an indicator were provided to register-,this weight, the indicator in all probability would show an yindication usually exceeding this amount at the time the car starts and thus give an im.

properI indication as the direct pull on the `cables is naturally greater when the car'is These auxiliary controlling means may be.

operated in a number of different ways` Specification of Letters Patent.

Patented May il 3, 191 3.

Application filed November 7, 1911. ,Serial No. 658,984.

`which would effect this result, but the one Which I have preferred to illustrate herein comprises a controlling mechanism controlled by the position ot the door which closes the entrance to the elevator shaft so that the indications may'only be made as a particular door is opened and will not be made after the doors are all closed.

I will explain my invention more-in deltail by reference to the accompanying drawings illustrating one embodiment -thereof with modifications, in which:

Figure 1 is a detail diagrammatic View illustrating my invention; Fig. 2 is a general view showing the general application.m

Fig, 3 is a modification whereby the con'- troller also controls the indicato-1'; Fig. 4 is a detail View showing .the adjustability of the device; Fig. 5 is a modification; Fig. 6 is a simplified form of the apparatus set forth in Fig. 1, and: Figs. 7 and 8 are detail views whereby the car controlling mechanism may be rendered operative or inoperative.

Referring more particularly to Fig. 2', I show an elevato-r car 1 Within a shaft 2, which car is supported by means of cables 3. Doors 4 and 5 are shown which close the entrance to the shaft or hatch 2'. Each elevator car is provided with an indicator 6 and an alarm 7. The alarm 7 receives 'its current preferably from a battery 8 and is controlled by the pointer 9 of the indicator 6 and the contact element 10. Circuit wires 11 and 12 lead from theelectrical apparatus thus specified, the Wire 11 'being connected with cont-act springs 13, 13 and t-he Wire 12 being connected With the stationary contacts 14, 14. The door 4 is shown as Y.closed and the door 5 as open in the diagran'nnatic sketch of Fig. 1. Thus when the door 4 is closed the contact bet-Ween elements 13 and 14 is open and when all the doors are closed and the car 1 is ready tov start then the alarm circuit is open.- When however, any door such as 5 is open the alarm circuit is closed andthus the registrations and alarms are given as the load is being placed upon or taken oil the said car. After all the weight has beenplaced on the car or taken oil and t-he door closed preparatory to starting, if the weight in the car is just suliicient not to act-nate the alarm, then the further pull caused upon the cable 3 by the additional eiiort due to the raising of the car, such additional Weight Will not cause the element 7 to operate. The indicator 6 may of course give this extra indication or not, as may be desired. The indicator 6 is provided with indicia 15 indicating the weight and is preferably operated by means ofv a flexible shaft 1G connected to a pinion 1.7 which is suitably mounted on abridge 18. This bridge 18 and the associated cable connecting parts form a hitch structure as indicated in United States Letters Patent to Carl A. Anderson, #969,222 dated Sept. 6, 1910.

l The car l has the upper cross pieces 19 which support the car and to these cross pieces the bridge 18 is secured. The cable or cables 8 by means of the link 20 are continued through the bridge. 1S and are then tlexibly associated with the said bridge through the agency of the spring 21, the' washer 22 and nut 23. As before stated the pinion l? is secured to some portion of the elevatorcarstructure and a racl24t is mounted at some portion of the cable, preferably thewasher 22, so that this rack by asso-- ciation with the pinion 17 causes a rotation of the flexible shaft 16 in accordance with the weight upon the car by virtue of the resilience of the spring 21. y.

It will thus be seen that the weight ofthe car is being continually indicated upon the` indicator 6 and the contact 10 is so arranged that the alarm 7 will operate Whenever this Weight exceeds a predetermined. amount; The additional etl'ort or reduced etio'rt on the cable caused by the raising or lowering of vthe car does not influence the proper indications as these indications are controlled preferably when the car is at a standstill, prefer- 49 ing of elevators is thus set forth. The indiably by the doors 4: and 5 as set forth. L

A simple system for preventing overloadcater 6 of course may be of the recording type of device as is Well understood.

Referring more particularly to Fig. 6, I show a simplified form in Which the indicator may bc eliminated but in which the circuit through the alarm 7 is controlled by the springs 25 and 2G, spring 25 being preferably mounted on the bridge 18, and spring 26 being preferably carried by the bolt 23. The spring 25 is insulated as shown.` The Wires l1 and l2 may continue respectively to the controlling mechanism provided in connection with the doors asin thecase of Fig. 1.

In Figs. 7 and 8, I have illustrated a controller 27 of the electric control variety commonly used in elevators and which has controlling wires leading from the source of 'current supply. The controller 27 has a handle 32 operating Within a slot 28 by which the movement of the elevator is controlled. The dial has the'pointer 9 adapted to coperate with the contact 10. The pinion 1'1" is secured to a second pinion 29 l by means of the shaft 30. A rack 31 is se cured to a rod `li() associated with the second rack 41. This second rack copera-tes Wim the pinion 42 controlling the pointer 9. f'i. magnet 43 is arranged serially With the bai'- tery 8 and alarm '7. This magneto drop har` a shutter 44 having two arms 45, 45 :is mow clearly indicatedv in Fig. 8 and when thif-l shutter arm falls down, as when drop Bris energized, the arms 45 prevent movement oi? the handle 32. lVhcn current flows through coils of the drop 43 the armature 46 is ab tracted, thereby raising the arm 47 permit the shutter Llf-l to fall.

It will .thus be seen that when the is too great at starting, the Valarm 7 soi and the shutter 44 prewnts the. oper. from moving the handle 32. Of cours control of the handle may also be `et without the coperation of an audible :Ln-irai., After the' handle 32 has been moved to :foerate the car, the arms .strengagc the brake of this handle ,32 so that it is not stopped in an intermediate position.V The operator may then restore the shutter manually or other- Wise as may be desired.

Referring more particularly to Fig. 3, I have shown contacts 13*l and 14a which are respectively analogous so far as the function they perform, as the contacts 13 and 14 of Fig. 1. Thus after the door has closed and no alarm has sounded, the first movement of the handle breaks the alarm circuit, the same as the doorsl il and 5 would do.

In Fig. 4 I set fort-h a-niodification of the structure of Fig. 6 in which contacts 25 and 26 are used, contact being adjustable by means of the screw 33, and this adjustment of the contacts then be sealed by the in- Spector by inserting a Wire with a seal through the head 3,4 of the screw 38 and the stationary plate 85. e In this Way the device is then safe against tam ering.

'In Fig. 5, I show a further modification,

in which the bridge 18 is provided with a cup-shaped element 36 and a second cooperating cup-shaped element 37 is provided on the link 20. The union between these two elements 36 and 37 is air tight and the interior leads by means of the tube 8 to a pneumatic indicator 39, thus accomplishing by pneumatic means the same functions as accoinplished electrically and set forth in Fig. l. v f

As before stated I have described specilically severalforms of carrying out my inn vention, but its varied application will be readily apparent.

Having thus described however, certain forms of carrying out my invention, What I claim as newand desire to secure by Letters Patent is.:

'1. In combination with a movable transporting platform, means for moving said platform, means for giving an indication when the Weight on the said platform ex 'ceeds a predetermined amount, gates to control accessto said platform, and means to prevent the said indication operable when said gates are in their accesspreventing position.-

v2.*In combination With' a movable transporting platform, means for moving said platform, means to indicate the Weight car ried bysaid platform, means for giving an indication operable when the weight on the said platform exceeds a predetermined amount, gatesto control access to .said platform, and means to prevent the said indication when said gates are in their access preventing position;

3. In combination with a weight carrying-- platform, means for moving said platform having resilient association with the said platform, means interposed between the said means and the said platform to give an iiidication when the Weight of said platform exceeds a given predetermined amount, gates to control access to said platform, and means tol prevent the said indication operable when said gates are in their access preventing position.

4. In combination with a weight carrying platform, means for moving Said platform having' resilient association with the said platform, means interposed between the said meansand the said platform to control an indicator for indicating the weight carried by said platform and to give an indication when the Weight of said platform exceeds a given predetermined amount, gates to control access to said platform, and means to prevent the said indication 'operable when l.said gates are in their access preventing poto at timespreventthe said indication, said last aforesaidm'eans comprising a door arid I- controlling devices under the control' of said 'when the weight on t ceeds a predetermined amount, gates to conporting platform, :means for moving said platform, means to indicate the weight carried by'said platform, means for giving an indication when the Weight on the said platform exceeds a predetermined amount, and

means to at times prevent the said indication, said last aforesaid 'means comprising a. door and controlling devices under the control of said door.

7. In combination with a weight carrying platform, means for moving said platform having resilient association with the said platform, means interposed between the said means and the said platform to give an indication when the weight of said platform -eitceeds -a given predetermined amount, and means to at times prevent the said indication, said last aforesaid means comprising a door and controlling devices under the control of said door.

8. In combinationwith a weight carrying platform, means for moving said platform having resilient association with the` said platform` means interposed between thesaid means and the said platform to controlan indicator for indicating the weight'carried by said platform and to give anindication when the weight of said platform exoeedsa given predetermined amount, and means to at times prevent thez said indication, said last aforesaid means comprising a door and controlling devices under the control of said door.

9) In combination' with a movable transporting platform, means for moving said platform, means for giving an indication e said platform extrol access to said platform, and means operable by said gatesto prevent .the said indication when said ygates are in their access reventino" osition. Y

In witness whereof, I hereunto subscribed' f i'ny name this 19th day of October, ApD. 19H. 

